The invention relates to a process for treating keratin fibres, in particular human keratin fibres such as the hair, comprising: (i) a step of applying an oxidized polysaccharide, (ii) a step of heating to a temperature of at least 100 C., (iii) a step of applying a pyridinedicarboxylic acid compound. The process makes it possible to obtain good hair-conditioning cosmetic properties, with a long-lasting effect. The invention also relates to a cosmetic composition and a kit used for performing the treatment process.

The present invention relates to a hair treatment method including the following step (i) and step (ii) in this order: Step (i): a step of applying a composition containing the following component (A) on a hair: (A) a compound represented by the following general formula (1) or a salt thereof:

##STR00001## wherein a broken line represents the presence or absence of a bond; R.sup.1 represents a hydroxy group or an acetoxy group; R.sup.2 represents a hydrogen atom or COOR (R is a hydrogen atom, a methyl group, or an ethyl group); and R.sup.3 represents a hydrogen atom, an acetyl group, a methyl group, or an ethyl group; and Step (ii): a step of giving a shape to the hair while applying a temperature of 140 C. or higher and 220 C. or lower to the hair.

This disclosure relates to hair styling compositions and processes, and more particularly to compositions for disentangling or crosslinking hair that are useful in hair styling processes.

This disclosure relates to hair styling compositions and processes, and more particularly to compositions for disentangling or crosslinking hair that are useful in hair styling processes.

The present invention relates to a composition comprising a polymer, wherein this polymer is water-soluble and has a melting point of at least 145 C. and comprises sulfonic acid groups, and an organic amine having at least two amino groups, and optionally further cosmetic ingredients. Furthermore, the present invention relates to a process for restyling human hair comprising applying to the human hair a composition comprising a polymer, wherein this polymer is water-soluble and has a melting point of at least 145 C. and comprises sulfonic acid groups, and an organic amine, and optionally further cosmetic ingredients, thereafter heat-treating the hair, together with the composition on its surface, thereafter allowing the hair to cool down to a temperature of below 100 C., and thereafter changing the hair style by heat-treating the hair. Furthermore, the present invention relates to the use of the said polymer or of the said composition for restyling human hair.

The present invention relates to a composition comprising a polymer, wherein this polymer is water-soluble and has a melting point of at least 145 C. and comprises sulfonic acid groups, and an organic amine having at least two amino groups, and optionally further cosmetic ingredients. Furthermore, the present invention relates to a process for restyling human hair comprising applying to the human hair a composition comprising a polymer, wherein this polymer is water-soluble and has a melting point of at least 145 C. and comprises sulfonic acid groups, and an organic amine, and optionally further cosmetic ingredients, thereafter heat-treating the hair, together with the composition on its surface, thereafter allowing the hair to cool down to a temperature of below 100 C., and thereafter changing the hair style by heat-treating the hair. Furthermore, the present invention relates to the use of the said polymer or of the said composition for restyling human hair.

The invention relates to a cosmetic process for treating keratin fibers, preferably the hair, comprising at least the steps consisting in: a) applying to said keratin fibers a composition containing at least one substance chosen from fatty substances, non-silicone polymers and surfactants, b) applying a mechanical tension to said keratin fibers, and c) exposing said keratin fibers under mechanical tension to microwaves, at a pressure ranging from 50 000 to 250 000 Pa, in the presence of at least one solvent in vapor form on contact with the keratin fibers and without there being complete drying of the keratin fibers throughout the entire exposure to the microwaves, the solvent(s) in vapor form being entirely generated by evaporating at least one compound present, before emission of the microwaves, on contact with the keratin fibers, step a) taking place prior to step c).

The invention relates to a cosmetic process for treating keratin fibers, preferably the hair, comprising at least the steps consisting in: a) applying to said keratin fibers a composition containing at least one substance chosen from fatty substances, non-silicone polymers and surfactants, b) applying a mechanical tension to said keratin fibers, and c) exposing said keratin fibers under mechanical tension to microwaves, at a pressure ranging from 50 000 to 250 000 Pa, in the presence of at least one solvent in vapor form on contact with the keratin fibers and without there being complete drying of the keratin fibers throughout the entire exposure to the microwaves, the solvent(s) in vapor form being entirely generated by evaporating at least one compound present, before emission of the microwaves, on contact with the keratin fibers, step a) taking place prior to step c).

The present invention teaches a hair straightening system including formulations that will safely and effectively straighten curly hair for at least 2-3 months after a single application, despite frequent washings of the hair. Methods for obtaining said formulations are disclosed. Hair straightening systems including shampoo and one or more conditioners are also provided.

The present invention teaches a hair straightening system including formulations that will safely and effectively straighten curly hair for at least 2-3 months after a single application, despite frequent washings of the hair. Methods for obtaining said formulations are disclosed. Hair straightening systems including shampoo and one or more conditioners are also provided.